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Abstract

Approaches in Poultry, Dairy & Veterinary Sciences

Risk-Based Avian Influenza Surveillance System for Poultry in The Republic of Korea: Response to H5/H7 Virus Detection in Wild Birds

  • Open or CloseYoon H1*, Lee I1, Kim KS1, Cho G2, Kim H2 and Lee E1

    1Veterinary Epidemiology Division, Animal and Plant Quarantine Agency, Gimcheon, Gyeongsangbuk-do, 39660 Republic of Korea

    2Finance·Fishery·Manufacture Industrial Mathematics Center on Big Data, Pusan National University, Pusan, 46241 Republic of Korea

    *Corresponding author: Hachung Yoon, Veterinary Epidemiology Division, Animal and Plant Quarantine Agency, Gimcheon, Gyeongsangbuk-do, 39660 Republic of Korea

Submission: December 02, 2021;Published: December 13, 2021

DOI: 10.31031/APDV.2021.08.000696

ISSN : 2576-9162
Volume8 Issue5

Abstract

Avian Influenza Virus (AIV) belongs to the alphainfluenzavirus genus of Orthomyxoviridae and is infected with various types of vertebrates such as mammals as well as birds. AIVs are classified into various subtypes based on the combination of the different surface proteins, Hemagglutinin (HA) and Neuraminidase (NA). So far there are 16 HA and 9 NA subtypes, therefore the combination of HA and NA results in 144 subtypes, theoretically [1]. Considering that, in H5 and H7 virus types, cases of highly pathogenic have been confirmed, when either of these two types of AIV is detected, a response must be promptly implemented in regarding as highly pathogenic. In the Republic of Korea, the winter management of Highly Pathogenic Avian Influenza (HPAI) is strengthened by setting special control period from late autumn of October to early spring of February or March. During this period, specimens of wild birds (e.g. feces, dead bodies, captures) are collected and actively surveilled by testing on AIVs [2]. In this study, a comparison will be done, between winters of 2019/2020 and 2020/2021, on the livestock vehicles and farms, which were epidemiologically linked to the detection of H5 AIV in wild birds. In 2020, starting with the first detection on October 10, 23 cases of H5 viruses were detected in wild birds of 17 regions (cities and counties), but HPAI was not confirmed. Meanwhile, in the winter of 2020/2021, a total of 297 cases of H5 or H7 AIV were detected. Of these, 234 cases detected in 65 regions were confirmed to be H5N8 HPAI virus. The first detection was confirmed on October 21, 2020. In addition, HPAI was confirmed in 109 poultry farms in 48 regions. And in 25 regions, HPAI was confirmed in both wild birds and poultry.

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